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Title: Three-dimensional supercritical resolved light-induced magnetic holography
Authors: Hao, Chenglong
Nie, Zhongquan
Ye, Huapeng
Li, Hao
Luo, Yang
Feng, Rui
Yu, Xia
Wen, Feng
Zhang, Ying
Yu, Changyuan
Teng, Jinghua
Luk’yanchuk, Boris
Qiu, Cheng-Wei
Keywords: Big Data
Digital Storage
Issue Date: 2017
Source: Hao, C., Nie, Z., Ye, H., Li, H., Luo, Y., Feng, R., et al. (2017). Three-dimensional supercritical resolved light-induced magnetic holography. Science Advances, 3(10), e1701398-.
Series/Report no.: Science Advances
Abstract: In the era of big data, there exists a growing gap between data generated and storage capacity using two-dimensional (2D) magnetic storage technologies (for example, hard disk drives), because they have reached their performance saturation. 3D volumetric all-optical magnetic holography is emerging rapidly as a promising road map to realizing high-density capacity for its fast magnetization control and subwavelength magnetization volume. However, most of the reported light-induced magnetization confronts the problems of impurely longitudinal magnetization, diffraction-limited spot, and uncontrollable magnetization reversal. To overcome these challenges, we propose a novel 3D light-induced magnetic holography based on the conceptual supercritical design with multibeam combination in the 4π microscopic system. We theoretically demonstrate a 3D deep super-resolved Embedded Image purely longitudinal magnetization spot by focusing six coherent circularly polarized beams with two opposing high numerical aperture objectives, which allows 3D magnetic holography with a volumetric storage density of up to 1872 terabit per cubic inches. The number and locations of the super-resolved magnetization spots are controllable, and thus, desired magnetization arrays in 3D volume can be produced with properly designed phase filters. Moreover, flexible magnetization reversals are also demonstrated in multifocal arrays by using different illuminations with opposite light helicity. In addition to data storage, this magnetic holography may find applications in information security, such as identity verification for a credit card with magnetic stripe.
DOI: 10.1126/sciadv.1701398
Rights: © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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